Uber employed 34,000 people worldwide as of December 31, 2025, per its 10-K filed with the SEC on February 13, 2026. Those 34,000 employees supported $52.017 billion in FY2025 revenue, about $1.53 million per employee. This post covers Uber’s headcount growth, revenue per employee, workforce composition, segment revenue, and Q1 2026 results. Uber Employee Statistics – TL;DR Uber had 34,000 employees on December 31, 2025, up 9.32% from 31,100 a year earlier. Revenue per employee reac...

I enjoyed the busy city life in Melbourne for a few days, but soon the adventurer and nature seeker in me took over again. It so happens that one of the best road trips in the world is around the corner: The Great Ocean Road . It is also the world's largest war memorial, dedicated to soldiers killed during World War I. After a wonderful group trip in Rotorua , I was again looking to share the experience with other people. It didn't take long to gather our fellowship, which coincidentally con...

It’s surprising to me how I haven’t spent a great deal of time exploring Italian coffee culture, especially given my proclivity for consuming said beverage. I’ve been reliably informed that Australia’s coffee snobbery was derived in large part by waves of Italian and Greek immigration (and German, which included my dad). It’s regularly cited as the reason why chains like Starbucks have struggled to get as much of a foothold in the country, though I’ve argued that’s but one factor ...

The tenth episode of Wonders of Web Weaving is out : In Episode 10, I chat with Kristoffer and Elliott , the creators of the Internet Phone Book . We talk about, among other things, the history of the Internet Phone Book, the affordances of physical books for a community project, and more. I hope you enjoy the episode! Wonders of Web Weaving also has an RSS feed you can use to follow along from wherever you get your podcasts. Kristoffer Elliott Internet Phone Book The tenth episode ...

I’m co-teaching a lesson for the Carpentries next week about the impact of LLMs on teaching. Here are a few things I’ve been reading to prepare: Barba2026 Lorena A. Barba and Laura Stegner: “The Conversational Exam: A Scalable Assessment Design for the AI Era”. https://arxiv.org/abs/2601.10691 , 2026. Conversational exam (live coding + explanation in small groups) restores assessment validity against generative AI cheating; 58 students examined in 2 days; combines authentic pra...

Matt asked me a question recently about the end of my People and Blogs run. The question was if I always thought I was going to hand it over at some point, and it’s an interesting question worth expanding on, which is why I told him I was going to write a post about it, rather than simply answering via email. I started and ended more online projects than I can remember at this point. I bought a dozen domain names, coded way too many sites, only to have them all inevitably bite the dust, som...

I feel that some vibecoded software changes somewhat randomly and unexpectedly. That made me think about Bruegel’s “The Tower of Babel” which shows an already quite chaotic depiction of the Tower of Babel. The story is usually told as one about pride and ambition and ultimately why people no longer speak the same language. But it is also a story about the unity that makes technological progress work. The text begins with a technology upgrade: And they said one to another, Go to, ...

Digital identities and what they mean for the web have become a hot topic of discussion in the last few years. They have also brought many controversies: age verification laws and what they mean for online anonymity, Wikipedia potentially having to verify the identify of its users in the UK, the reliance on official iOS and Android operating systems as mandatory form factors for digital identity wallets, not to mention what these inter-dependencies mean when your US digital accounts are cancelle...

A few weeks ago I decided to be bold and put out there that I had itches I wanted to scratch. It isn't something I normally do, as I usually reject myself before allowing others to do so. So, after the Wonders of Web Weaving podcast was published, I rejoiced online and said that I was grateful for how, in 2026, I'd experienced a couple of things for the first time: being an MC at a conference and being a guest on a podcast, and that I was keen for more. So I was invited to chat on the codebar ...

Herman Chernoff passed away on July 6, 5 days after turning 103. Ravi Boppana wrote a guest post about Chernoff's life for his 100th birthday.  Let me talk about his most famous work, the Chernoff Bounds themselves. If you have a coin that will be heads with probability \(p\), and you flip it \(n\) times, the expected number of heads is \(pn\). Informally Chernoff bounds says that for large \(n\) the number of heads will be quite close to \(pn\) with an exponentially small probability ...

Julia Roberts? She was in that one movie with that guy, and the other one with the other guy, and like 100 more. Whatever. But she’s old news. Like all the other celebrity names I actually recognize, which isn’t a lot, but is some.  Just a minute ago a headline floated by: Person A is doing Thing with Person B, what will Person C think? I have no idea: Who the people are, their relationship or lack thereof, their various claims to fame. I do not possess any crumbs of context helping m...

A presigned URL is a replay attack you did on purpose. Replayable auth tokens are the textbook way to create vulnerable systems, but Tigris ships them as a first-class feature with presigned URLs and so does every other object storage system on the planet. However this isn't an oversight because presigned URLs turn a weakness into a feature. Replay attacks are a real problem and the classic fix is miserable When you authenticate a request wit...

By Parth Jain , Rakesh Sukumar , Yingwu Zhao , Renzo Sanchez-Silva & Nathan Fisher A deep dive into the engineering challenges of building a real-time service dependency map at Netflix scale: from streaming architectures and distributed aggregation pipelines to time-travel queries and the methodology that made it work. Introduction In our first post , we introduced the problem: engineers at Netflix needed a unified, real-time view of service dependencies to troubleshoot faster, understan...

Your “Bluesky account” is not just a Bluesky account: it is an account that can be used with a variety of other applications. This post is going to be an exploration of part of what that means from a technical perspective, so if you’re not a software developer, this post isn’t for you. But what I’m going to explain is the technical mechanism for how your account works separate from Bluesky, and in fact, separate from any particular app. Let’s talk about identity: who are you, any...

Look at the past history of this blog. There are many blog posts about programming with AI, a few of them date back to January 2024 (like this: https://antirez.com/news/140). I’m a relatively well regarded programmer, after all. I don’t have the need to still be in the “loop” as a old man that seeks for relevance, I recently rejoined Redis, and now I also am developing a new open source software for local LLM inference that received a good welcome in the community. Why I keep doing this,...

Last week, Kate Ivey-Williams, the Head of UCD on my programme, asked me: “What do you think your role is as a designer?” I said: “Errr… I design products that are easy to use… errr… I realise that’s a rubbish answer…” Kate saved me: “Don’t worry, I put you on the spot” But even so, as a designer you should be ready to be put on the spot because: If you aren’t able to explain what you do, it’s much harder for your teammates and stakeholders to value what...

I went for an 8km (5 mile) run this evening. I'm working my way up to 10km, but I think this was a little too much, too soon. We'll see how my middle-aged joints are in the morning... Thanks for reading this post via RSS. RSS is ace, and so are you. ❤️ You can reply to this post by email , or leave a comment . I went for an 8km (5 mile) run this evening. I'm working my ...

LLMs generate code incredibly fast, but to ensure they generate exactly what is intended, they need clear boundaries. Abstractions and Domain-Specific Languages (DSLs) provide a strong harness that guides LLMs right from the start. Unmesh Joshi describes how the example of Tickloom - a domain model and DSL for illustrating distributed system behavior - shows how we can use an LLM as a partner to iteratively build a DSL and as a natural language interface t...

The Fourier series is a great tool for analyzing periodic functions. But what about functions that don’t repeat? We’ve seen that we can compute Fourier series for a non-periodic function defined on a finite interval, as long as we don’t care about its behavior beyond that interval. Let’s extend this idea to functions that never repeat; that is, non-periodic functions defined on the interval (-\infty,\infty) . Visualizing Fourier series for non-repeating functions To motivate...

Software engineers are often told to “start playing politics”, but most engineers have no idea what that means. Their reference point for “playing politics” comes from fiction like Game of Thrones. Are they supposed to raise an army and depose the CEO, or poison each other at team lunch? Should they book Zoom calls with each other and plot schemes? All of that is obviously ridiculous. In terms of Game of Thrones, software engineers are not lords and ladies. We’re the soldiers and w...

When I was first learning to write, my letters and words ran from right to left, reversed as if in a mirror. Being left-handed, I was imitating the hand strokes of my right-handed teachers instead of reversing their strokes to replicate the letters. I gradually got the hang of writing in the correct direction, but it still feels natural for me to mirror-write. I have a mirror-written childhood… Source When I was first learning to write, my letters and words ran from right to left, reversed ...

The scraping problem is worse than anyone can imagine and thanks to my friends at Sourceware we have some real data to prove it. I've been working more on Anubis' reputation database and I've run into a really weird discovery: 80-90% of the hits created by the honeypot feature are from IP addresses that do not belong to any existing threat monitoring lists. Here's a breakdown of the honeypot hits Sourceware has gotten in the last few months: Assessment of ./da...

We may have gone to the Moon before but we haven’t been to its south pole. There’s a big difference. The south polar environment is far harsher than the near-equatorial or mid-latitude sites where Apollo astronauts and most robotic missions have landed. At the lunar poles, the slopes are far steeper , Sun and Earth visibility for power and communications respectively more limited, temperatures inside water-hosting permanently shadowed regions crossing into cryogenic realms , and smooth...